/***************************************************************************************
	JavaScript Calendar - Digital Christian Design
	//Script featured on and available at JavaScript Kit: http://www.javascriptkit.com
	// Functions
		changedate(): Moves to next or previous month or year, or current month depending on the button clicked.
		createCalendar(): Renders the calander into the page with links for each to fill the date form filds above.
			
***************************************************************************************/

var thisDate = 1;							// Tracks current date being written in calendar
var wordMonth = new Array("Janeiro","Fevereiro","Março","Abril","Maio","Junho","Julho","Agosto","Setembro","Outubro","Novembro","Dezembro");
var today = new Date();							// Date object to store the current date
var todaysDay = today.getDay() + 1;					// Stores the current day number 1-7
var todaysDate = today.getDate();					// Stores the current numeric date within the month
var todaysMonth = today.getUTCMonth() + 1;				// Stores the current month 1-12
var todaysYear = today.getFullYear();					// Stores the current year
var monthNum = todaysMonth;						// Tracks the current month being displayed
var yearNum = todaysYear;						// Tracks the current year being displayed
var firstDate = new Date(String(monthNum)+"/1/"+String(yearNum));	// Object Storing the first day of the current month
var firstDay = firstDate.getUTCDay();					// Tracks the day number 1-7 of the first day of the current month
var lastDate = new Date(String(monthNum+1)+"/0/"+String(yearNum));	// Tracks the last date of the current month
var numbDays = 0;
var calendarString = "";
var eastermonth = 0;
var easterday = 0;


function changedate(buttonpressed,modalidade,prova,faseprova,faseprovagrupo,clube,jornada) {
	
	data_seleccionada = 0;
	
	if (buttonpressed == "prevyr") yearNum--;
	else if (buttonpressed == "nextyr") yearNum++;
	else if (buttonpressed == "prevmo") monthNum--;
	else if (buttonpressed == "nextmo") monthNum++;
	else  if (buttonpressed == "return") { 
		monthNum = todaysMonth;
		yearNum = todaysYear;
	}
	else  { 
		data_seleccionada = buttonpressed;
	}

	if (monthNum == 0) {
		monthNum = 12;
		yearNum--;
	}
	else if (monthNum == 13) {
		monthNum = 1;
		yearNum++
	}

	lastDate = new Date(String(monthNum+1)+"/0/"+String(yearNum));
	numbDays = lastDate.getDate();
	firstDate = new Date(String(monthNum)+"/1/"+String(yearNum));
	firstDay = firstDate.getDay() + 1;
	
	createCalendar(data_seleccionada,modalidade,prova,faseprova,faseprovagrupo,clube,jornada);
	return;
}



function easter(year) {
	// feed in the year it returns the month and day of Easter using two GLOBAL variables: eastermonth and easterday
	var a = year % 19;
	var b = Math.floor(year/100);
	var c = year % 100;
	var d = Math.floor(b/4);
	var e = b % 4;
	var f = Math.floor((b+8) / 25);
	var g = Math.floor((b-f+1) / 3);
	var h = (19*a + b - d - g + 15) % 30;
	var i = Math.floor(c/4);
	var j = c % 4;
	var k = (32 + 2*e + 2*i - h - j) % 7;
	var m = Math.floor((a + 11*h + 22*k) / 451);
	var month = Math.floor((h + k - 7*m + 114) / 31);
	var day = ((h + k - 7*m +114) % 31) + 1;
	eastermonth = month;
	easterday = day;
}


function createCalendar(data_seleccionada,modalidade,prova,faseprova,faseprovagrupo,clube,jornada) {
	
	variaveis_get = "?idm=" + modalidade + "&idp=" + prova + "&idfp=" + faseprova + "&idfpg=" + faseprovagrupo + "&idc=" + clube + "&j=" + jornada;

	calendarString = '';
	var daycounter = 0;
	calendarString += '<table width="292" border="0" cellpadding="2" cellspacing="0">';
	calendarString += '<tr>';
	calendarString += '<td colspan=\"2\" class=\"tdMonthName\"><a href=\"javascript: return true;\" onClick=\"changedate(\'prevmo\',\'' + modalidade + '\',\'' + prova + '\' ,\'' + faseprova + '\',\'' + faseprovagrupo + '\',\'' + clube + '\',\'' + jornada + '\');\"><<\/a><\/td>';
	calendarString += '<td class=\"tdYearName\" colspan=\"3\"><b>' + wordMonth[monthNum-1] + '&nbsp;&nbsp;' + yearNum + '<\/b><\/td>';
	calendarString += '<td colspan=\"2\" class=\"tdMonthName\"><a href=\"javascript: return true;\" onClick=\"changedate(\'nextmo\',\'' + modalidade + '\',\'' + prova + '\' ,\'' + faseprova + '\',\'' + faseprovagrupo + '\',\'' + clube + '\',\'' + jornada + '\');\">><\/a><\/td>';
	calendarString += '<\/tr>';
	calendarString += '<tr>';
	calendarString += '<td class=\"tdWeekName\">Dom<\/td>';
	calendarString += '<td class=\"tdWeekName\">Seg<\/td>';
	calendarString += '<td class=\"tdWeekName\">Ter<\/td>';
	calendarString += '<td class=\"tdWeekName\">Qua<\/td>';
	calendarString += '<td class=\"tdWeekName\">Qui<\/td>';
	calendarString += '<td class=\"tdWeekName\">Sex<\/td>';
	calendarString += '<td class=\"tdWeekName\">Sab<\/td>';
	calendarString += '<\/tr>';

	thisDate == 1;

	for (var i = 1; i <= 6; i++) {
		calendarString += '<tr>';
		for (var x = 1; x <= 7; x++) {
			daycounter = (thisDate - firstDay)+1;
			thisDate++;
			if ((daycounter > numbDays) || (daycounter < 1)) {
				calendarString += '<td class=\"tdWithoutDay\" ><\/td>';
			} else 
			{
				aux = yearNum + '-' + monthNum + '-' + daycounter;
				
				if ((data_seleccionada != 0) && data_seleccionada==aux) {
					calendarString += '<td class=\"tdSelectedDay\"><a href=\"javascript: changedate(\'' + yearNum + '-' + monthNum + '-' + daycounter + '\',\'' + modalidade + '\',\'' + prova + '\' ,\'' + faseprova + '\',\'' + faseprovagrupo + '\',\'' + clube + '\',\'' + jornada + '\');\" onClick=\"document.getElementById(\'frameMainResults\').src = \'main_results.php' + variaveis_get + '&idd=' + yearNum + '-' + monthNum + '-' + daycounter + '\' \">' + daycounter + '<\/a><\/td>';
				}
				else
					if ((todaysDay == x) && (todaysDate == daycounter) && (todaysMonth == monthNum)) {
						calendarString += '<td class=\"tdCurrentDay\"><a href=\"javascript: changedate(\'' + yearNum + '-' + monthNum + '-' + daycounter + '\',\'' + modalidade + '\',\'' + prova + '\' ,\'' + faseprova + '\',\'' + faseprovagrupo + '\',\'' + clube + '\',\'' + jornada + '\');\" onClick=\"document.getElementById(\'frameMainResults\').src = \'main_results.php' + variaveis_get + '&idd=' + yearNum + '-' + monthNum + '-' + daycounter + '\' \">' + daycounter + '<\/a><\/td>';
					}
					else	
					{ 
						calendarString += '<td class=\"tdDay\"><a href=\"javascript: changedate(\'' + yearNum + '-' + monthNum + '-' + daycounter + '\',\'' + modalidade + '\',\'' + prova + '\' ,\'' + faseprova + '\',\'' + faseprovagrupo + '\',\'' + clube + '\',\'' + jornada + '\');\" onClick=\"document.getElementById(\'frameMainResults\').src = \'main_results.php' + variaveis_get + '&idd=' + yearNum + '-' + monthNum + '-' + daycounter + '\' \">' + daycounter + '<\/a><\/td>'; 					
					}
			}
		}
		calendarString += '<\/tr>';
	}
 
	var object=document.getElementById('calendar'); 
	object.innerHTML= calendarString; 
	thisDate = 1; 
}